declare type StartAction = {
    type: 'start';
};
declare type SetAction = {
    type: 'set';
    payload: number;
};
declare type IncrementAction = {
    type: 'increment';
    payload: {
        maxPercent: number;
        add: number;
    };
};
declare type FinishAction = {
    type: 'finish';
};
declare type ResetAction = {
    type: 'reset';
};
declare type Actions = StartAction | SetAction | IncrementAction | FinishAction | ResetAction;
export declare function reducer(state: number, action: Actions): number;
export interface Config {
    maxPercent?: number;
    intervalTime?: number;
    increment?: () => number;
}
export declare function usePrevious<T>(value: T): T | undefined;
export declare function useProgress(isActive: boolean, config?: Config): number;
export {};